v1.6.7
Docker reference: paritytech/substrate-relay:v1.6.7
Rococo: 1_010_000;
Westend: 1_010_000;
Kusama: 1_002_004;
Polkadot: 1_002_000;
Rococo Bridge Hub: 1_010_000;
Westend Bridge Hub: 1_010_000;
Kusama Bridge Hub: 1_002_005;
Polkadot Bridge Hub: 1_002_008;
Rococo Bulletin: not supported yet;
Polkadot Bulletin: not supported yet.